Elevate your designs with a COSTUMAKERS 23 cm (9 in) one-way separating zipper in black. Featuring #5 metal teeth mounted on reinforced polyester tape, this medium weight closure delivers smooth operation, corrosion resistance, and consistent dye‑lot colour. Precision‑cut tape maintains exact width for hassle‑free installation, while ergonomic pulls make opening and closing effortless. Perfect for sportwear, each production lot is tensile‑strength and slider‑fatigue tested to guarantee reliability in tough, real‑world use. From small‑batch prototypes to high‑volume runs, makers rely on COSTUMAKERS for tight length tolerances, shade consistency, and hardware that stays functional season after season.